Phoenix (PHX) to Boston (BOS): On-Time Performance
Data through July 2026
Phoenix (PHX) to Boston (BOS) effectively runs on two schedules. In November 2024, 88% of arrivals were on time; in July 2026 that fell to 62% — a 26-point seasonal swing. Across the full period the route averages 78% on-time against a national 78%.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 5.5
- last 12 months
- Duration
- 4h 55m
- scheduled
- Distance
- 2,300 mi
Best airline from PHX to BOS
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 79% | 21 min | 1.7% | 838 |
| American Airlines | 79% | 14 min | 1.0% | 2,765 |
| JetBlue Airways | 73% | 23 min | 1.4% | 797 |
Monthly on-time trend
Best time to fly from PHX to BOS
Aim for departures around 9 a.m. (85% on-time); avoid 3 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 17 min |
| Tuesdaybest | 82% | 13 min |
| Wednesday | 80% | 14 min |
| Thursday | 72% | 20 min |
| Friday | 75% | 23 min |
| Saturday | 81% | 17 min |
| Sunday | 75% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft41%
- Airline operations35%
- National airspace system22%
- Weather1%
Frequently asked questions
- How often are flights from PHX to BOS delayed?
- 22% of PHX–BOS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from PHX to BOS?
- Delta Air Lines has the best on-time record on this route at 79%, based on 838 flights. 3 airlines flew PHX–BOS frequently enough to compare in this period.
- What is the best time of day to fly from PHX to BOS?
- Departures around 9 a.m. have the best record (85% on-time), while departures around 3 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PHX to BOS?
- The scheduled PHX–BOS flight time averages 4h 55m over 2,300 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are PHX to BOS flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from PHX to BOS?
- July 2026 was the roughest month in this dataset, with only 62% of arrivals on time. The best was November 2024 at 88%. If your dates are flexible, that 26-point gap is worth planning around.
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Based on 4,400 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.